Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
cua triet » cua viet, su triet, va triet
cap nuoc » dat nuoc
te sach » toc sach
xu lang » tu lang, xu dang, xu quang
cu lang » cua lang, tu lang, chi lang
cac xuc » cam xuc, cac nuoc, chat xuc

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((xu lang) OR (cu lang)) xa hoi. hieu qua ((cac xuc) or (cap nuoc)) gia thanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((xu lang) OR (cu lang)) xa hoi. hieu qua ((cac xuc) OR (cap nuoc)) gia thanh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((xu lang) OR (cu lang)) xa hoi. hieu qua ((cac xuc) or (cap nuoc)) gia thanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((xu lang) OR (cu lang)) xa hoi. hieu qua ((cac xuc) or (cap nuoc)) gia thanh dai cua triet*.